Hardest breed to train?

Hands down, this breed is the toughest, the most hyper, the most costly, and the most stressfully- -destructive dog on this planet. We have trained this breed, sometimes 4 @ once, and have been simply stunned, by all the damage that these little hurricanes can consistanly invent out of thin air. The Choc Lab (puppy) loves nothing more than to burn it all down, revel in the pleasure of eating the ash and rubble only to poop it all out and do it all over again. Seek. Destroy. Decimate. They never tire or get bored with their craft. Training takes time to perfect and condition. I recommend the 45 days, then another 2 weeks a few months later. All the Choc Labs that I have trained have all met with a successful outcome. We have 4 that come back regularly, they live close by, for boarding and or/ doggie daycare. Mr. Bean and Genieve are really the best and the brightest. Sadie is really great. Gunner was the toughest ever. Charlie Brown was runner up. Cocoa and Diesal: Diesal was easier than his sister. Both were a dynamic duo, and were trained with Genieve. Harley was really hard. Simply Huge and most stubborn at 4 years old, not nuetered. I am Happy to say that all of these Choc Labs are doing very well. I can provide references for everyone. Do you have a Choc Lab?